Etal. def. pub.
temperature deviation indicator for plural
capacitive temperature sensors



T g Qt 9K1 DEFENSIVE PULICATION UNITED STATES PATENT OFFICE Published at the request of the applicant or owner in accordance with the Notice of Apr. 11, 1968, 849 O.G. 1221. Identification is by serial number of the application and the heading indicates the number of pages of specification, including claims, and of sheets of drawing contained in the application as originally filed. The file of this application is available to the public for inspection; reproduction may be purchased for 60 cents per sheet.

Applications published under the Defensive Publication Program have not been examined as to the merits of alleged invention. The Patent Ofiice makes no assertion as to the novelty of the disclosed subject matter.

PUBLISHED APRIL 8, 1969 861 O.Gr. 367

573 227 TEMPERATURE DEVIA'iION INDICATOR FOR PLURAL CAPACITiVE TEMPERATURE SENSORS Paul Hugus Gaither IV, Claymont, and Chester Allen Mellinger, Jr., Wilmington, Del., assignors to E. I. du

Pont de Nemours and Company, Wilmington, Del., a

corporation of Delaware Filed Aug. 18, 1966. Published Apr. 8, 1969 (Ilass 340227 7 Sheets Drawing. 21 Pages Specification This invention relates to a multi-position machine having temperatures controlled with capacitor temperature controllers of the type disclosed in US. Patent No. 3,112,- 070. The device of the invention comprises a solid state actuated, reed relay time sharing multiplexer for connecting each controller sequentially, individually, first to the input and then to the output terminals of a monitor. The monitor comprises an assembly of logic circuit modules including a programmer to ensure the proper sequence of operations; a memory to store characteristic standard frequency value for each controller; a down-counter to compute the magnitude and sign of the difference between the actual frequency output of the controller and its frequency at set temperature; a limit set module to furnish tolerable 55 lESl m limits to the above frequency difference; a compare module to furnish a signal when the frequency difference exceeds any of the set limits; and an indicate actuator module to furnish a positive or negative pulse back to the controller when the high or low frequency difference limit has been exceeded. In each controller there is provided an indicator lamp lighting circuit responsive to signals from the indicate actuator module such that one lamp is energized upon receipt of a positive pulse or another lamp for a negative pulse.

19M SN 573227 P. H. GAITHER |v. ETAL DEF. PUB; TEMPERATURE DEVIATION INDICATOR FOR PLURAL CAPACITIVE TEMPERATURE SENSORS April 8, 1969 I2 56 TEST 0.5.0.

CONTROLLER LVI CONTROLLER CONTROLLER INVENTORS PAUL HUGUS GAITHER 112' CHESTER ALLEN MELLINGER, JR.

BY #owwnd/ 1 111441394) ATTORNEY (9 M5 SN 573227 P 1969 P. H. GAITHER IV, ETAL DEF. PUB.

TEMPERATURE DEVIATION INDICATOR'FOR PLURAL CAPACITIVE TEMPERATURE SENSORS Filed Aug. 18, 1966 Sheet 2 of 7 son; w

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L1H E2 E5 April 8, 1969 Filed Aug. 18, 1966 INVENTORS PAUL HUGUS GAITHER N CHESTER ALLEN MELLINGER, JR.

BY W ATTORNEY SN 573227 P" 8, 1969 P. H. GAITHER IV, ETAL DEF. PUB.

v TEMPERATURE DEVIATION INDICATOR FOR PLURAL CAPACITIVE TEMPERATURE SENSORS Filed Aug 18, 1966 Sheet 6 017 QQFL INVENTORS PAUL HUGUS GAITHER 11' CHESTER ALLEN MELLINGER, JR. BY #owwzd Mai/9'0 ATTORNEY L if i? 5 2 111111 u i an. a ll L 2 H P k c2. A h a! 02. 46m 2 2 E E Q; as as 02 U l l l u l w I I I I A mm 80m SN 573227 Apnl 8, 1969 P. H. GAITHER IV, ETAL DEF. PUB.

TEMPERATURE DEVIATION INDICATOR FOR PLURAL CAPACITIVE TEMPERATURE SENSORS Filed Aug. 18, 1966 Sheet Z 01' 7 INVENTORS' PAUL HUGUS GAITHER m CHESTER ALLEN MELLINGER, JR.

BY W 1944114199 llmut a; a; in M 3 N "H mm "NH irl II. P J 2 a a 2 mass A ATTORNEY 

